WO2010001711A1

WO2010001711A1 - Controller of internal combustion engine with variable dynamic valve gear mechanism

Info

Publication number: WO2010001711A1
Application number: PCT/JP2009/060814
Authority: WO
Inventors: 吉野太容; 荒井勝博; 影山雄三
Original assignee: 日産自動車株式会社
Priority date: 2008-06-30
Filing date: 2009-06-09
Publication date: 2010-01-07
Also published as: EP2314845A1; JPWO2010001711A1; US8768601B2; EP2314845B1; JP5104948B2; CN102076942A; US20110106410A1; CN102076942B; EP2314845A4

Abstract

A controller (13) of an internal combustion engine with a variable valve gear, which comprises a variable valve gear mechanism (9) performing continuous variable control of the close timing and the working angle of an intake valve (7), a section (B60) for detecting a possibility of occurrence of pre-ignition, and a throttle (15) for controlling the amount of intake air, and which delays the close timing of the intake valve behind a bottom dead center by increasing the working angle of the intake valve when a possibility of occurrence of pre-ignition is detected, wherein provided are a section (B55) for calculating the upper limit limiting value of a working angle for limiting the upper limit value of the working angle of the intake valve, and a section (B61) for calculating the upper limit limiting value of a throttle opening for limiting the upper limit value of the throttle opening based on the working angle of the intake valve.

Description

Mysterious

Fluctuating combustion engine technology

The present invention relates to air control of an internal combustion engine having a variable mechanism that can variably control the intake valve.

It is known that variable valve operation can be used for variable operation to improve the power performance of the combustion engine and to control fuel costs. If the internal combustion engine with variable motion is operated at the actual height, there is a risk that a loose plug may be generated when the cooling temperature becomes high.

Therefore, 002 29994A, issued by the Japanese National License Office in 2002, is a technique for preventing the life of a piggypy. It proposes to reduce engine capacity. Indication of light

However, if the air volume is restricted according to the above technique, the engine unavoidable. On the other hand, it is possible to change the timing so as to decrease, but there is a possibility that the vehicle will generate vibration and noise due to the timing. Therefore, I will provide an installation of a variable combustion engine that can prevent the occurrence of piggyback and suppress vibrations and noise generated on both sides. Objective.

In order to achieve the target, it is equipped with a variable mechanism that continuously controls the intake valve period and, a means for detecting the possibility of the occurrence of a push, and a control for controlling the intake amount. When the possibility of ignition is detected, the air valve period is retarded from the bottom due to the size of the intake valve. As long as the operation is performed to calculate the set value, the set calculation stage and the set value calculation stage as long as the limit value is set based on the intake valve. .

This and other features will be explained in the subsequent sections of the description and will be shown in the description.

A simple description of the surface

G ・ is an internal combustion engine that applies this light.

2 is a variable mechanism.

It is a figure which shows the example of S3A and 3 and a timing.

G4 is a block diagram of timing control and spot control according to this statement.

G ・ 5 is a stick figure of the cutter as far as the operation by this light is concerned.

・ 6 is a chart showing the scatter value as far as operation is possible.

G · 7 is a diagram showing the characteristics of the tuft-set amount as far as the operation of this light is concerned.・ 8 is a graph showing the formation of the target atmospheric pressure clutter.

Good for carrying out Ming

G on the plane, see, for vehicles controlled by Mt. The engine includes an air passage 5 and an exhaust passage 6 for combustion and combustion, respectively. An intake 7 is provided at the mouth of the air passage 5, and an exhaust tube 8 is provided at the mouth of the exhaust passage 6. 7 is driven via a variable motion 9. 8 is the exhaust power

Driven by.

The combustion engine has two intakes and eight exhausts. Correspondingly, two air passages 5 and six air passages 6 are provided. The two intake passages 5 are branched from the two passages having an opening in the direction of the dud 2 at the part of the dad 2. The two exhaust passages 6 merge at the portion of the dud 2 and are integrated into a passage having an opening on the surface of the dadd 2.

Spray on the surface.

Fire hydrant 2 is provided for combustion.

The stand 5 is provided in the intake passage 5 before branching. St 5 is basically kept fully open. By controlling the amount of intake air 7 of this combustion engine. However, in order to generate a negative in the intake passage 5 that requires a negative for the stack, the size of the stud 5 is reduced. Instead of providing a stool 4, a pop can be used to handle the need for

The exhaust power 0 is a general rotary type. Fluctuation 9 variably controls the operation of intake 7 and has the configuration described below.

Here, the intake 7 is the amount of intake 7. In addition, the possibility of a to-be-controlled amount does not mean that the maximum amount of the ton is controlled, but the tom in the cycle of the intake tube 7 does not mean.

In this embodiment, a variable mechanism is provided only on the intake valve 7 side, but a similar variable mechanism is provided for the exhaust valve so that the timing of the air valve can be controlled according to the operating condition. Fluctuation 9 is composed of a combination of a lit 20 that changes the operation of the intake 7 and a 2 that advances or retards the ft.

In addition, this 20 is issued together with 2 by the Japanese National License Office in 2002, according to 00289303A, 02893, etc.

Lift 2 is supported by a rack 22 in the G. Dadd 2 part, and the eccentric force 23 fixed by this 22 and the drive 22 with the same racket. Rotation supported and driven 22 Control 24 arranged in parallel, cam 28 supported in a swingable manner by 24 heart forces 25, and power to tape 42 arranged in 7 3 and are provided. Tsukaam 28 is connected to Kumu 26 via a connecting pin 27 in the vicinity, and is connected to Ku 30 via the connection 29 in the other vicinity. 3 The rocking force 3 is connected via the connecting pin 45.

22 is driven by the engine's strength 23 through the timing or without timing.

The heart force 23 has a circular shape, and the heart of the heart 23 is offset from the heart of the drive 22 by a predetermined amount.

In the cam 28, the heart force 25 penetrates to rotate. The heart force 25 is eccentric from the center of the control 24, and the center of movement of the cam 28 changes according to the control 24 position.

The motive power 3 is supported by the drive 22 in a rotating manner, and the link 30 is connected to the connecting pin 45 in the direction 3 perpendicular to the direction of the drive 22. And connect. This power 3 is composed of 3 C, which is concentric with the drive 22, and 3, which draws a line with the above 3. These 3 and 3 hit the surface of the tape 42 according to the position of the swinging force 3.

In other words, 3c is the interval between the suction strokes when the amount of intake air 7 is reduced, and when the swinging force 3 swings and 3b contacts the touch 42, the intake air 7 returns to. There is a little lap between the sac and the toss.

24 is configured to rotate within a predetermined range by a lift control hydraulic actuator 44 provided on one side. It is controlled by this oil pressure actuator 44, Tra 3 et al.

When the drive 22 is rotated in the second position, the lift 26 moves up and down due to the eccentric force 23, and the cam 28 swings with the swing 24 as the swing. Oscillating force 3 is oscillated through the pivot 30 of the cam 28 and the oscillating force 3 is oscillated. By using this power 3, the tappet 42 is made and the intake air 7 is returned. Where

When the control hydraulic actuator 44 changes the degree of control 24, the position of the swinging force 3 changes while the cam 28 is moving.

Assuming that the eccentric force 25 is placed upward, the cam 28 is upward as a whole, and the swinging force 3 3 is relatively lifted upward. That is, the rocking force 3 is tilted away from the tappet 42. Thus, when the oscillating force 3 oscillates as the drive 22 rotates, 3 c continues to contact the tappet 42 for a long time, and the period during which 3 3 contacts the tappet 42 is short. As a result, the amount of lith is reduced as a whole. That is, reduces.

On the contrary, if the eccentric force 25 is corrected downward, the cam 28 is corrected downward as a whole, and the swinging force 33 is relatively pushed downward. That is, 3 of the swinging force 3 is inclined toward the tappet 42 in the approaching direction. Thus, when the swinging force 3 swings with the rotation of, 22, the part in contact with the tappet 42 immediately shifts to the bases 3 c to 3 b. As a result, the overall volume increases or expands.

Since the mental power 25 is continuously changed, "" "" "." . .

In addition, G2 can be continuously expanded and reduced at the same time.

2. A sprocket 46 provided in the drive 22 and a control actuator 43 that relatively rotates the drive 46 of the pocket 46 within a predetermined range. The sp 46 rotates in synchronism with the crack via the tag or the tag. The control actuator 43 is controlled by the signals of the traffic 3 and the like. In accordance with the movement of the actuator 43, the sp 46 drive 22 rotates relative to the center angle or is delayed. That is, according to 2, the whole is advanced or retarded without changing the focus. This can also be obtained. The actuator 33 can be of any type such as hydraulic or electromagnetic.

As described above, the variable motion 9 allows the intake 7 and the operator to increase or decrease continuously at the same time, and continuously increases or decreases without changing the characteristics. Can be horned. In other words, the timing of the intake 7 can be controlled independently. In the embodiment, the suction valve 7 is set as follows.

G 3 shows an example of the timing for normal id conversion (id conversion that may cause a patch), and an example of the timing for 3B patch stop.

When the fuel cost is high, such as when turning, in order to reduce the poppigs, the operation is reduced and VC is set to the point as shown in G3.

In this state, if the temperature rises due to an increase in the temperature of the cooling air, a patch will occur.

In order to prevent push-up, as shown in 3, increase the operation and change the intake VC so that the piston position at the retarded VC is higher than that during normal idling. Is valid. This is because raising the vist position in can reduce the volume and lower it.

However, if the operation is increased as indicated by 3, the effect on the swinging force 3 is increased as the intake air 7 moves. For this reason, there is an increase in the number of sliding parts of the variable movement 9 such as 26, 28 30 and so on, and the increase in the capacity 26 of the mental force 23, resulting in a problem of large life and movement. In particular, the amount of is large and the sound and dynamics are noticeable in both lucks when the diversion is low, such as during ai.

In order to suppress this sound and movement to an allowable amount, for example, as shown by the mark 3, it is necessary to make it smaller than that for preventing the intake of the intake 7.

However, in this butting, the intake 7 period is close to the lower point, so it is higher than the timing for stopping the push. Because of this, this Pushing cannot be prevented with butting.

Therefore, in order to stop the push, it is necessary to reduce the intake air amount by reducing the value in the fifth section.

Tra 3 controls intake 7 timing 5.

Tra 3 is composed of a central processing unit (P), a read-only memory (R), a random access memory (R), and an input / output timer (event). It is also possible to configure the trait 70 with a number of pics.

G 4 is a book diagram explaining the timing control and the stop control executed by the trunk 3. Tora 3 keeps this constant (for example,

) Repeat every time. Note that this figure is based on the performance of a trait and does not mean a physical existence.

In B5, the target load, which is the target value of the internal combustion engine power, is calculated by searching for the target target based on the inspection of the accessor 5 classifier 52 etc. shown in 2. To do. This is input to the timing B55 as the target acceleration stage, the acceleration B53 as the stage, the target air volume 54, and the upper limit calculation stage as the upper limit calculation stage.

At the timing B52, the target timing is calculated by searching for the specified target timing on the basis of the target and target matter determination B60 et al. The timing is basically a timing for achieving the target load, and when there is a risk of the occurrence of a plugging, it is a timing for avoiding this. The target buoy issued in this way is input to the target B56. In acceleration 53, the acceleration of the target load is calculated from the previous calculation until the first calculation, and this is input into the B55 as long as it operates.

In the air volume B54, the target air volume, which is the air volume to achieve the target load, is searched for, for example, to search for the target volume, and this is set as the target station 58.

The upper limiter 55 calculates the upper limiter for limiting the operation by the control described later based on the target load and target acceleration, and inputs this to the target.

In B56, is calculated based on the target as long as the target butting operation is active. In other words, the target determined by the target timing and the limit imposed by the operation is the target. Input to this variable actuator 57.

The plug-in case determination 60 detects a condition related to the performance of the plug-in as a means for detecting the possibility of the occurrence of the plug-in. Puigyo is likely to occur when the temperature rises due to an increase in the cooling air temperature. Therefore, the cooling temperature and temperature are used as the conditions regarding the performance of the piggy water. These are detected. Then, the detected cooling air temperature is input to the target atmospheric pressure upper limiter 6 corresponding to the point calculation stage as long as the target timing 52 is described. Note that the conditions to be detected here are not limited to the cooling temperature and temperature, and other conditions may be detected as long as they affect the life of the patch.

In 62, the variable motion actuator 57 detects when the result of the control based on the target is detected, and the detection result is converted to a product calculation 63.

In product calculation 63, data is calculated based on. 0, statically, the value obtained by subtracting the red product at the intake valve VC from the red product at C is the stroke product. However, in actuality, the intake start time and the value for C and the intake valve VC, respectively. Produce.

This is because before the intake valve C, da reaches the intake pressure. The amount of time that the actual process ends with respect to the air valve VC increases as the gin rotation speed increases and as the engine speed decreases.

Therefore, in the volume calculation 63, the maximum amount is calculated from the characteristics of the intake air 7. Then, the above-mentioned advance amount is set as C set, the gin rotation speed is set as a parameter, and VC set CO S is obtained by referring to this set, and the intake valve C is subtracted from C set CS. The crank position is released as effective C when the intake stroke ends.

On the other hand, the deviation from the uplift C at the time when the inhalation stroke starts is caused by the return of breath by the lap.

In other words, when 7 is opened in the abnormal state, the pressure decreases from the air pressure, and the air pressure is delayed from C on the intake air. Recently, the aperture area is small, so the da is small, and it starts near the Olap heart angle OC where the actual exhaust flow rate becomes the maximum. The amount until the time (C) when the actual start is started after the start of the lowering of the dip, the higher the di-rotation speed, the more the lap (the smaller the lap, the greater the effect and It increases by.

Therefore, in da product calculation 63, first, intake VO, intake air

Input VC and calculate the overlap angle C. Physically, 7 determined by VO, intake VC Based on the known 8 and the sex ritual amount agrees (the angle of crack at ㈲ is given as the Olap heart angle OC.

Then, wrap around the heart angle C with reference to the specified angle. The smaller the angle of the Olap heart angle OCA is, the larger the Olap O has a characteristic.

In this case, the rotation speed Olap O is set as a parameter and the amount from the Olap heart angle OC to the effective C is set as the C offset. Then, the effective C is obtained by adding the C set COS to the lap angle OC.

Then, input the intake air, intake air C, and effective C, and, from the characteristics of intake air 7, refer to the top and output the same C, effective VC, and input the effective air C. Refer to the top and issue.

This target set 58 and target pressure limit only

Entered in 6.

Atmospheric pressure limit 6 calculates the upper atmospheric pressure limit to limit the target atmospheric pressure. Since the intake pressure depends on the stoot, limiting the intake pressure means limiting the stall. Therefore, the clutter value as long as the target pressure is exceeded corresponds to the clutter value as long as it is above the target pressure.

As far as you can see, tta B6 will explain in detail later on the line calculation.

In step 58, the target sut is calculated based on the target air volume, volume, and target air pressure. In other words, the limit determined by the target as long as the target air volume and the target are determined based on the target air volume The added item is the target set. Input to this suitcase control actuator B59.

As a method of calculating the target volume based on the target air volume and data, the method disclosed in JP2 7 2 78083 issued in 2007 by the Japanese National Police Agency may be used. it can.

Next, the explanation will be given in the case of operation as far as possible.

G · 5 is a block diagram for explaining the control executed by the cutter 55 as far as the operation is concerned. First, utter set 7 is calculated as long as it operates, based on the target acceleration.

The top used here is as shown in, that is, when the target acceleration is below the predetermined value V, the tampering amount is as long as it operates. Become.

In the upper limit cutter 72, based on the upper limit of the target set target 5, the cutter value is set as far as the upper limit by the rope. It has the properties shown here. In other words, the value is constant as long as the operation is performed under a predetermined value. Becomes constant again.

G · 6 is a diagram for explaining the values as far as the operation is concerned. This figure shows the characteristics of the working angle and the upper limit value with respect to the load when there is no risk of patch generation at a certain 0 position. No. 6 is an operation that satisfies the condition to suppress movement, and Operation 2 is for stopping the push. Also, load 2 is low and load 2 is high.

As shown in the figure, as long as it is in operation, the clutter value is under the condition that the sound and vibration 5 are kept within the allowable range. Produces sound and vibration Since this is required, the data value is set as long as such operation is possible. In this state, there is a possibility that the push cannot be prevented. Although there is a concern that the output performance will be degraded due to the control of sta. 5,

The demand is low, so it doesn't matter.

On the high 3, it remains constant at the operation 2 above that for the stop of the push. This is because the crying output performance is increased by, and because the combustion noise becomes loud, the variable mechanism becomes conspicuous and the demand for suppressing noise and vibration decreases. In other words, it is to avoid a drop in output performance by preventing the push-up only by changing the operation without performing the stud control. 9 2 should be set to a value greater than that for stopping the pug, in order to prevent the pugging more surely.

In other words, TR 3 gives priority to the requirement to limit the sound and vibration within the allowable range rather than the output performance, and avoids the pig by using the stud control together. On the other hand, priority is given to output performance over noise and vibration, and plugging is prevented only by changing the operation.

In the region between load and height (2), the load reaches 3 and is proportional to the load of the engine up to an operation exceeding 2 to stop the noise as long as the noise movement is suppressed. Increase the value of 7. When the paddy field is switched step by step with a predetermined load, it will change in a step-step manner, resulting in a point of sale.

The reason why the operation is increased according to the load in the range from 3 to load 3 is to prevent such a shock.

If you set the operation upper limit value in this way, the

If there is a risk of life, the operation will not be increased. In this Since it cannot be prevented, the volume is reduced by controlling the sta5 to prevent the push.

On the other hand, if there is a risk of a piggy over the load 3, it is possible to prevent the piggy with only a large amount of operation, avoiding a drop in the output and preventing the piggyback. Can do.

The upper setter amount is the amount by which the switching value of the operating upper value is moved to. As the acceleration increases, the upper limit value increases. As shown in Fig. 7, the larger the target degree, the greater the operation from the load. By making a special order like this, the stroke value will increase as much as possible in operation, so even if there is an actuator that drives the variable motion 9, it is possible to suppress a decrease in output during a transient.

In addition, for example, in a vehicle equipped with an automatic speed gear capable of shifting at a speed higher than this speed, it is expected that the speed will be higher than when the speed mode is selected. In the state, you may set the value of the cutter on operation. This makes it possible to maintain good operation while avoiding instability due to increased control. In this case, the tra 3 that detects the traveling position by the transmission gear number is the sensor that predicts the speed.

Note that the range between the load and 3 is as large as possible in relation to the load in relation to the load. The upper limit value is set to 0 when the load is 2 and the upper limit value is set for the load from the load 2. It is also possible to operate as 0 2. In this case, there will be a load that causes the cutter value to be cut as far as the operation is concerned. With such a simple configuration, it is possible to reduce the operation load and to simplify each unit.

In addition, the scatter value should increase in proportion to the load from the load to the load as far as the operation is concerned. Anyway. In this case as well, the load at which the cutter value switches as long as the operation is changed depends on the set amount of the operation.

G ・ 8 is a detailed drawing of the pressure bar B6 of ・ 4.

In the arithmetic part g, the effective (Ve Vc is calculated from the stroke Ve which is defined by da c and the piston cylinder.

In the upper g2, the upper c, which is the degree at the point, is calculated from the air temperature by ().

c X () K

At the upper pressure B93, the upper pressure P at which the upper pressure is not generated is calculated from the upper c cooling.

The top used here is the upper pressure P of the push-up, the horizontal axis is the upper c, and the relationship with the upper p-up c of the cooling is determined for each cooling. The higher the upper air pressure P, the lower the upper c, and the lower the cooling temperature, the lower the upper air pressure P. In other words, even if the same top c, the higher the cooling is, the more the plug is generated from the low pressure, and if the same is the same, the upper c is the characteristic that the generated from the low pressure.

At the atmospheric pressure upper limit 94, the target atmospheric pressure upper limit is calculated, which is the value in parentheses in the trachea to keep the upper pressure P under the pressure of P.

Physically, when used in upper Bg2, it is the target atmospheric pressure by (2) from the upper air pressure P Calculate Patta as far as atmospheric pressure.

P Pc (2)

Note that (2) is an equation when the compression process is assumed to be adiabatic, but other equations that take cooling into consideration may also be used.

The target pressure booster P thus issued is input to the stand 58 of 4 together with the target air volume and da as described above.

According to (2), the larger the push-up air pressure P is, and the smaller the effective pressure is, the larger the target P is as far as the target air pressure is. On the other hand, the higher the operation, the smaller the effective Vc, and the smaller the effective, and the smaller the effective, the lower the upper c, and the higher the push-up air pressure P.

Therefore, the larger the operation, the larger the target P as far as the target atmospheric pressure is, and the larger the target value as far as the Maristo.

It is needless to say that changes can be made within the technical scope described in the scope of patent claims, although the present invention is not limited to the above embodiments.

With regard to the above explanation, the contents of 20 8 0 2 in Japan filed on 2008 6 30 are incorporated herein by reference.

Top Usability

As described above, since the set value is set as long as the operation is limited by the intake valve based on the demand determined by the operation state, the performance can be suppressed. In addition, since the set value is set only on the stow according to the operation, if the operation is restricted and the push life cannot be avoided only by the timing change, the set value is set. You can avoid push-up life.

Some features of this manifestation are cumulated as follows:

Claims

Solicitation

A variable motion (9) that can continuously control the period and time of the air valve (7), a sensor (0) that detects the possibility of the occurrence of a patch,

(Study to control intake air amount)

With

Variable motion that retards the air valve timing more by increasing the intake valve when the possibility of occurrence of the plug is detected. (9) In the control of the combustion engine

Calculate the set value as much as possible in order to limit the air valve in response to a request to suppress the sound and movement determined by the programmed zero relationship as follows: (5) The limit value is set based on the intake valve ()

Have 2

In the place of the variable combustion engine described in Kumu,

The Tolera (70) is further programmed to produce a set value based on engine load as long as it is operational. Three

In the place of the variable combustion engine described in Kumu,

The tra (70) is further programmed so as to increase the upper limit of the load range relative to the upper limit of the load range. Is done. Four

In the place of the variable combustion engine described in Cum 3,

In the above load range, the tra (70) avoids patch life by controlling the stud while the operation is at the maximum value in the above range. In the above load range, only the operation is changed. Is further programmed to avoid plug live. Five

In the place of the variable combustion engine described in the difference between Cum 2 and 4

A sensor 3) that detects the speed at which the target load is applied,

The tra (70) is further programmed to increase the upper limit value at the same load as the target acceleration increases. 6

In the arrangement of the combustion engine according to one of the deviations of Cum 2 to 5, the upper limit value is a relatively large and constant value at a predetermined value, and is a relatively small and constant value at. 7

In the place of the variable combustion engine described in Cum 6,

The tra (7) is limited to the upper limit as long as the upper limit is above the predetermined amount. It is further programmed to increase according to the size up to the upper limit of 20 values. 8

(The variation described in Cum 6 or 7)), the above-mentioned upper limit value is an operation that satisfies the demand according to the operating state, and the upper-limit value is This is the upper value of the operation that can avoid live life. 9

(Variation described in the deviation of Cum 6 to 8))

A sensor (3) for determining the state or not;

If this sensor (3) is determined to be in the state, it is further programmed to reduce the tra (70) load.

In the place of the fluctuating fuel engine described in one of the deviations of Cum 6 to 9,

A sensor () that predicts the degree of

If this sensor () is expected to increase the speed, the tra (70) is further programmed to predict the load.

A variable movement (9) that can continuously and variably control the timing and period of the air valve (), A sensor (0) that detects the possibility of the occurrence of a plug, a stop () that controls the intake air amount,

With

Variable motion that retards the valve timing by lowering the intake valve by increasing the intake valve when the possibility of the occurrence of a plug is detected. (9)

Calculate the limit value for the upper limit of the operation to limit the air valve according to the demand determined by the operating condition (5)

The limit value is limited based on the intake valve. (B6) o